Java枚举与Switch

/**
 * @Author Tiam
 * @Date 2021/12/27 18:00
 * @Description: 枚举类的使用
 */
public enum Enum_ {
    //注意分割符,最后一个以分号结尾.
    MONDAY("星期一"),
    TUESDAY("星期二"),
    WEDNESDAY("星期三"),
    THURSDAY("星期四"),
    FRIDAY("星期五"),
    SATURDAY("星期六"),
    SUNDAY("星期日");
    /**
     * 星期
     */
    private String week;

    /**
     * 构造器
     * @param week
     */
    Enum_(String week) {
        this.week = week;
    }

    /**
     * get,set方法
     * @return
     */
    public String getWeek() {
        return week;
    }

    public void setWeek(String week) {
        this.week = week;
    }
}

/**
 * @Author Tiam
 * @Date 2021/12/27 20:17
 * @Description: 枚举与switch语句的配合使用
 */

public class Burrito {
    Enum_ em;

    Burrito() {
    }

    public Burrito(Enum_ em) {
        this.em = em;
    }

    /**
     * 枚举与switch语句的配合使用
     * @return
     */
    String describe() {
        switch (em) {
            case MONDAY:
                return Enum_.MONDAY.getWeek();
            case TUESDAY:
                return Enum_.TUESDAY.getWeek();
            case WEDNESDAY:
                return Enum_.WEDNESDAY.getWeek();
            case THURSDAY:
                return Enum_.THURSDAY.getWeek();
            case FRIDAY:
                return Enum_.FRIDAY.getWeek();
            case SATURDAY:
                return Enum_.SATURDAY.getWeek();
            case SUNDAY:
                return Enum_.SUNDAY.getWeek();
            default:
                throw new IllegalArgumentException("非法参数");
        }
    }

    public static void main(String[] args) {
        System.out.println(new Burrito().em);
        System.out.println(Enum_.FRIDAY);
        System.out.println(Enum_.FRIDAY.getWeek());
        Burrito
                b1 = new Burrito(Enum_.MONDAY),
                b2 = new Burrito(Enum_.SUNDAY),
                b3 = new Burrito(Enum_.THURSDAY);
        String d1 = b1.describe();
        String d2 = b2.describe();
        String d3 = b3.describe();
        System.out.println(d1);
        System.out.println(d2);
        System.out.println(d3);
        /* Output:
                null
                FRIDAY
                星期五
                星期一
                星期日
                星期四
         */
    }
}